Richards, 19, is sidelined for the next five weeks as he recovers from surgery and is intent on letting the knee heal properly after the operation in London last week.
He revealed in his BBC Sport website column: "Physio Ally Beattie felt if I did not have it sorted it could get worse and keep me out long term. They told me what was happening on Tuesday and I whizzed down to London on the train on Wednesday for the operation at the Lister Hospital in Chelsea."
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